The Seiko dwarfs the Rolex the IWC dwarfs the Seiko. Its like a wrist alarm clock. How big are they, thickness also becomes an issue. The Rolex at 40 mm seems just right and perfect, making it bigger would spoil the balance, It is the most copied watch in the world. The Panerai at 44 mm is almost all dial making it appear bigger than it is and easy to read.